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Journal articles on the topic 'Simulačný model'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Achimský, Lukáš, and Veronika Achimská. "Simulačný model skladového hospodárstva." Pošta, Telekomunikácie a Elektronický obchod 7, no. 2 (2012): 1–6. http://dx.doi.org/10.26552/pte.c.2012.2.1.

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SEDLÁČEK, Michal. "SIMULATION MODELS AND POSSIBILITIES OF THEIR APPLICATION IN TEACHING TECHNICAL SUBJECTS IN THE CONTEXT OF INDUSTRIE 4.0." Trends in Education 13, no. 1 (2020): 12–19. http://dx.doi.org/10.5507/tvv.2020.002.

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Kocina, Ondřej J. "Simulační model výrobního procesu - malování a smaltování skla." Acta Oeconomica Pragensia 15, no. 6 (2007): 107–26. http://dx.doi.org/10.18267/j.aop.512.

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Kulhánek, Tomáš, and Jiří Kofránek. "VYSVĚTLUJÍCÍ POČÍTAČOVÉ MODELY (EXPLANATORY MODELS) V LÉKAŘSKÉ VÝUCE." Medsoft 36, no. 1 (2024): 1–14. https://doi.org/10.35191/medsoft_2024_1_36_pradka.

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Jakýmsi moderním norimberským trychtýřem usnadňujícím vstřebávání znalostí ve výuce medicíny jsou dnes tzv. vysvětlující počítačové modely (explanatory models). Jejich úlohou je pomocí simulačních her podpořit porozumění příčinám klinických příznaků a pochopení diagnostiky a terapie jednotlivých onemocnění v kontextu fyziologických regulací. Jádrem lékařských simulátorů jsou matematické modely fyziologických systémů. Jejich tvorba vyžaduje multidisciplinární spolupráci vysoce kvalifikovaných odborníků. Díky rozvoji výpočetní techniky se výukové simulátory staly novým trhem. Vývojem simulátorů

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Kofránek, Jiří, and Tomáš Kulhánek. "VYSVĚTLUJÍCÍ POČÍTAČOVÉ MODELY (EXPLANATORY MODELS) V LÉKAŘSKÉ VÝUCE." Medsoft 2024 36, no. 1 (2024): 1–14. https://doi.org/10.35191/medsoft_2024_1_36_kofranek.

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Jakýmsi moderním norimberským trychtýřem usnadňujícím vstřebávání znalostí ve výuce medicíny jsou dnes tzv. vysvětlující počítačové modely (explanatory models). Jejich úlohou je pomocí simulačních her podpořit porozumění příčinám klinických příznaků a pochopení diagnostiky a terapie jednotlivých onemocnění v kontextu fyziologických regulací. Jádrem lékařských simulátorů jsou matematické modely fyziologických systémů. Jejich tvorba vyžaduje multidisciplinární spolupráci vysoce kvalifikovaných odborníků. Díky rozvoji výpočetní techniky se výukové simulátory staly novým trhem. Vývojem simulátorů

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Mládek, Arnošt, Martin Vokurka, and Jiří Kofránek. "MATEMATICKÝ MODEL REGULACE ŽELEZA V ORGANISMU." Medsoft 2020 32, no. 1 (2020): 47–54. http://dx.doi.org/10.35191/medsoft_2020_1_32_47_54.

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S využitím námi vyvinutého vývojového nástroje BodyLight.js byla vytvořena výuková simulační aplikace, která interaktivní formou vysvětluje metabolismus železa v lidském organismu. V pozadí aplikace je matematický model vytvořený v jazyce Modelica. Náš vývojový nástroj umožnil propojit matematický model s grafickými objekty a výukovým textem a vygenero-vat výukovou aplikaci do standardizovaného HTML souboru, který je možné spouštět v běžném internetovém prohlížeči na počítači, tabletu nebo chytrém telefonu bez nutnosti instalace jakékoliv aplikace nebo rozšíření. Interaktivní aplikace se stane

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de Paula, Alexandre Silva, and Carlos Barreto. "Potential Distribution of Nysius simulans (Hemiptera: Lygaeidae) in Soybean Crops in South America Under Current and Future Climate." Journal of Economic Entomology 113, no. 4 (2020): 1702–10. http://dx.doi.org/10.1093/jee/toaa089.

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Abstract Nysius simulans (Stål) is a suctorial, fluid feeding herbivore that can transmit toxins and spread pathogens via saliva and is an economically important pest for soybean in South America. Currently, N. simulans in soybean is predominantly found in Argentina, but future changes in the distribution from both dispersal and range shifts due to climate change may affect soybean cultivation in southern South America. We developed a species distribution model to examine the distribution range of N. simulans. We compared the potential distribution of N. simulans under current and future proje

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Žák, Zdeněk, Oldřich Vítek, and Jan Macek. "Application of a Radial Turbine 1-D Model." Journal of Middle European Construction and Design of Cars 11, no. 1 (2013): 1–8. http://dx.doi.org/10.2478/mecdc-2013-0001.

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Shrnutí Članek, na několika přikladech, popisuje simulace s využitim 1-D modelu radialni turbiny turbodmychadla. Cilem je popsat současny stav a ukazat potencial 1-D přistupu v oblasti modelovani turbodmychadla. Pro možnost testovani modelů turbiny a kompresoru byly vyvinuty rozmanite simulačni nastroje. Model turbinoveho testovaciho stavu umožňuje provozovat turbinu v široke provozni oblasti. Model zkušebniho stavu turbodmychadel se spalovaci komorou je vhodny pro přiřazeni kompresoru turbině. Članek uzaviraji vysledky fungovani modelu turbiny ve spojeni s modelem virtualniho čtyřtaktniho zaž

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Pitoňák, Jaroslav, and Miroslav Galbavý. "The use of simulation models for the design of friction shifting elements used in planetary transmissions." Journal of Middle European Construction and Design of Cars 9, no. 2 (2011): 1–7. http://dx.doi.org/10.2478/v10138-011-0007-z.

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ZHRNUTIE Otazka projektovania a navrhovania transmisii nadobuda pri sučasnom využivani softverovych prostriedkov nove rozmery. Vypočtovy system Matlab ponuka široke možnosti pri vytvarani a skumani novych riešeni v prostredi matematickych modelov. Jeho sučasťou je aj modul SimDriveline, ktory nadobuda vyznam hlavne čo sa tyka zjednodušenia zostavenia modelu transmisie, vytvarania vzťahov medzi objektmi modelu, nazornosti, prehľadnosti, prezentacie vysledkov a pod. V tomto pripade sa však jedna o simulačne modely fyzikalne, ktore umožňuju modelovať spravanie sa systemu priamo popisom jeho fyzik

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Kliman, Richard M., Peter Andolfatto, Jerry A. Coyne, et al. "The Population Genetics of the Origin and Divergence of theDrosophila simulansComplex Species." Genetics 156, no. 4 (2000): 1913–31. http://dx.doi.org/10.1093/genetics/156.4.1913.

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AbstractThe origins and divergence of Drosophila simulans and close relatives D. mauritiana and D. sechellia were examined using the patterns of DNA sequence variation found within and between species at 14 different genes. D. sechellia consistently revealed low levels of polymorphism, and genes from D. sechellia have accumulated mutations at a rate that is ∼50% higher than the same genes from D. simulans. At synonymous sites, D. sechellia has experienced a significant excess of unpreferred codon substitutions. Together these observations suggest that D. sechellia has had a reduced effective p

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Russell, Renee L., and Reid A. Peterson. "Boehmite Dissolution Model Based on Simulant Data." Industrial & Engineering Chemistry Research 49, no. 10 (2010): 4542–45. http://dx.doi.org/10.1021/ie901841g.

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Wall, Jeffrey D., Peter Andolfatto, and Molly Przeworski. "Testing Models of Selection and Demography inDrosophila simulans." Genetics 162, no. 1 (2002): 203–16. http://dx.doi.org/10.1093/genetics/162.1.203.

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AbstractWe analyze patterns of nucleotide variability at 15 X-linked loci and 14 autosomal loci from a North American population of Drosophila simulans. We show that there is significantly more linkage disequilibrium on the X chromosome than on chromosome arm 3R and much more linkage disequilibrium on both chromosomes than expected from estimates of recombination rates, mutation rates, and levels of diversity. To explore what types of evolutionary models might explain this observation, we examine a model of recurrent, nonoverlapping selective sweeps and a model of a recent drastic bottleneck (

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Hvězda, Jiří. "A Multi-Zone Model of the Combustion Process in an Si Engine as an External Cylinder of the Gt-Power Simulation Tool." Journal of Middle European Construction and Design of Cars 12, no. 3 (2014): 8–14. http://dx.doi.org/10.2478/mecdc-2014-0010.

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Shrnutí Příspěvek představuje obecnou proceduru týkající se implementace uživatelského modelu jako externího válce simulačního nástroje GT-Power. Konkrétně, vyvinutý vícezónový model vysokotlaké části termodynamického cyklu čtyřdobého spalovacího motoru je zde použit jako přizpůsobený simulační kód pro zajištění výpočtů souvisejících s chemickou transformací spalování, přestupem tepla a odpovídajícími stavovými veličinami. Jsou zde prezentovány vybrané technické podrobnosti a výsledky tohoto propojení

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14

Farrell, Svetlana, H. Brian Halsall, and William R. Heineman. "BacillusglobigiiBugbeads: A Model Simulant of a Bacterial Spore." Analytical Chemistry 77, no. 2 (2005): 549–55. http://dx.doi.org/10.1021/ac049156y.

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15

Trumel, H., A. Dragon, and A. Fanget. "A finite-strain model for an explosive simulant." Le Journal de Physique IV 04, no. C8 (1994): C8–559—C8–564. http://dx.doi.org/10.1051/jp4:1994887.

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Metzger, Philip T., and Daniel T. Britt. "Model for asteroid regolith to guide simulant development." Icarus 350 (November 2020): 113904. http://dx.doi.org/10.1016/j.icarus.2020.113904.

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17

Zheng, Hu, and Yu Huang. "Model tests on flow slide of lunar regolith simulant." Environmental Earth Sciences 73, no. 8 (2014): 4853–59. http://dx.doi.org/10.1007/s12665-014-3767-7.

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18

Li, Yunli, Lugi Wang, Jiawei Li, and Wenping Wu. "An elastoplastic constitutive model of lunar soil simulant considering shear dilatancy and softening characteristics." Stavební obzor - Civil Engineering Journal 33, no. 1 (2024): 35–49. http://dx.doi.org/10.14311/cej.2024.01.0003.

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The study of the constitutive relationship of lunar soil is the key to a deep understanding of the mechanical properties of lunar soil and the subsequent construction of lunar bases. Previous models mostly focused on the strengthening behavior before the peak, while rarely reflected the post-peak softening and residual deformation stages during shear deformation. A new elastoplastic constitutive relation is derived with combining kinematic hardening model and initial shear stress, which effectively compensates for the shortcomings of existing constitutive models, and the validity of the model

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Martikainen, Julia, Olga Muñoz, Teresa Jardiel, et al. "Optical Constants of Martian Dust Analogs at UV–Visible–Near-infrared Wavelengths." Astrophysical Journal Supplement Series 268, no. 2 (2023): 47. http://dx.doi.org/10.3847/1538-4365/acf0be.

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Abstract We present an advanced light-scattering model to retrieve the optical constants of three Martian dust analogs: Johnson Space Center regolith simulant, Enhanced Mojave Mars Simulant, and Mars Global Simulant. The samples are prepared to have narrow particle-size distributions within the geometric-optics domain. We carry out laboratory measurements to obtain the particle-size distributions, shapes, and diffuse reflectance spectra of the Martian analogs deposited on a surface. Our model framework includes a ray-optics code to compute scattering properties for individual particles, and a

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Liu, Susu, C. Xu, Y. Wen, G. Li, and J. Zhou. "Assessment of bullet effectiveness based on a human vulnerability model." Journal of the Royal Army Medical Corps 164, no. 3 (2017): 172–78. http://dx.doi.org/10.1136/jramc-2017-000855.

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IntroductionPenetrating wounds from explosively propelled fragments and bullets are the most common causes of combat injury. There is a requirement to assess the potential effectiveness of bullets penetrating human tissues in order to optimise preventive measures and wound trauma management.MethodsAn advanced voxel model based on the Chinese Visible Human data was built. A digital human vulnerability model was established in combination with wound reconstruction and vulnerability assessment rules, in which wound penetration profiles were obtained by recreating the penetration of projectiles in

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Presgraves, Daven C. "A Fine-Scale Genetic Analysis of Hybrid Incompatibilities in Drosophila." Genetics 163, no. 3 (2003): 955–72. http://dx.doi.org/10.1093/genetics/163.3.955.

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Abstract The sterility and inviability of species hybrids is thought to evolve by the accumulation of genes that cause generally recessive, incompatible epistatic interactions between species. Most analyses of the loci involved in such hybrid incompatibilities have suffered from low genetic resolution. Here I present a fine-resolution genetic screen that allows systematic counting, mapping, and characterizing of a large number of hybrid incompatibility loci in a model genetic system. Using small autosomal deletions from D. melanogaster and a hybrid rescue mutation from D. simulans, I measured

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Akashi, Hiroshi. "Molecular Evolution Between Drosophila melanogaster and D. simulans Reduced Codon Bias, Faster Rates of Amino Acid Substitution, and Larger Proteins in D. melanogaster." Genetics 144, no. 3 (1996): 1297–307. http://dx.doi.org/10.1093/genetics/144.3.1297.

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Abstract Both natural selection and mutational biases contribute to variation in codon usage bias within Drosophila species. This study addresses the cause of codon bias differences between the sibling species, Drosophila melanogaster and D. simulans. Under a model of mutation-selection-drift, variation in mutational processes between species predicts greater base composition differences in neutrally evolving regions than in highly biased genes. Variation in selection intensity, however, predicts larger base composition differences in highly biased loci. Greater differences in the G+C content

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Zeng, L. W., and R. S. Singh. "The genetic basis of Haldane's rule and the nature of asymmetric hybrid male sterility among Drosophila simulans, Drosophila mauritiana and Drosophila sechellia." Genetics 134, no. 1 (1993): 251–60. http://dx.doi.org/10.1093/genetics/134.1.251.

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Abstract Haldane's rule (i.e., the preferential hybrid sterility and inviability of heterogametic sex) has been known for 70 years, but its genetic basis, which is crucial to the understanding of the process of species formation, remains unclear. In the present study, we have investigated the genetic basis of hybrid male sterility using Drosophila simulans, Drosophila mauritiana and Drosophila sechellia. An introgression of D. sechellia Y chromosome into a fairly homogenous background of D. simulans did not show any effect of the introgressed Y on male sterility. The substitution of D. simulan

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Russell, R. L., J. M. Billing, H. D. Smith, and R. A. Peterson. "Validation of Ultrafilter Performance Model Based on Systematic Simulant Evaluation." Industrial & Engineering Chemistry Research 48, no. 22 (2009): 10077–86. http://dx.doi.org/10.1021/ie901042w.

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Low, Siew Cheng, Nicky Eshtiaghi, Paul Slatter, Jean-Christophe Baudez, and Rajarathinam Parthasarathy. "Mixing characteristics of sludge simulant in a model anaerobic digester." Bioprocess and Biosystems Engineering 39, no. 3 (2016): 473–83. http://dx.doi.org/10.1007/s00449-015-1530-4.

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Liu, Junhao, Qian Li, Xiuli Xiong, and Lanlan Xie. "Simplified Particle Models and Properties Analysis Designed for DEM Lunar Soil Simulants." Aerospace 12, no. 4 (2025): 330. https://doi.org/10.3390/aerospace12040330.

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The discrete element method (DEM) is one of the most popular methods for simulating lunar soil simulants due to the lack of real lunar soil. To reduce the computational consumption and difficulty because of complex particle models, simplified particle models, in which a single particle consists of two, four, or six elements, are discussed in this paper. Three steps, including random generation, particle replacement, and sedimentation, can generate the proposed simulant. The relationship between the mechanical properties of the simulant and microscopic parameters defined in DEM was analyzed by

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Lautraite, Raphaëlle, Lise Bernard, Pascale Halle, et al. "Ex Vivo Model to Assess the Exposure of Patients to Plasticizers from Medical Devices during Pre-CAR-T Cells’ Apheresis." Toxics 10, no. 2 (2022): 79. http://dx.doi.org/10.3390/toxics10020079.

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Background: The treatment of relapsed or refractory leukemia remains a major problem. Among the new therapeutic approaches, the use of modified T lymphocytes, called chimeric antigen receptor T cells (CAR-T cells), seems promising. The first step of their preparation is leukapheresis, which involves the collection of mononuclear cells from the patient. This medical procedure requires numerous medical devices (MDs) made of plasticized polyvinylchloride (PVC). These compounds can leach out of the devices during contact with the patient’s blood. The aim of our study was to evaluate the migration

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Šťastný, Jiří, Vít Motyčka, Rostislav Doubek, Michal Brandtner, and Lukáš Bříza. "MONITORING STAVEB – SLEDOVÁNÍ NASAZENÍ ZVEDACÍCH PROSTŘEDKŮ." Czech Journal of Civil Engineering 4, no. 1 (2018): 85–92. http://dx.doi.org/10.51704/cjce.2018.vol4.iss1.pp85-92.

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Při realizaci pozemních staveb jsou ve velké míře využívány zvedací prostředky. Při jejich efektivním a správném využití lze lépe dodržet časový plán stavby, a tedy i termín plánovaného ukončení výstavby. Často dochází k neefektivnímu využívání zvedacích prostředků a vznikají tak prostoje nebo naopak zvedací prostředky nestíhají pokrýt požadované množství procesů. Zabýv.me se sběrem dat (časového vytížení zvedacích prostředků), které umožní posoudit využití zvedacích mechanismů v průběhu celé výstavby. Vyhodnocení naměřených dat bude podkladem pro simulační model, který umožní časovou v

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MOUNTFORT, KATRINA, JANET KELLY, SUE M. JICKELLS, and LAURENCE CASTLE. "A Critical Comparison of Four Test Methods for Determining Overall and Specific Migration from Microwave Susceptor Packaging." Journal of Food Protection 59, no. 5 (1996): 534–40. http://dx.doi.org/10.4315/0362-028x-59.5.534.

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Four approaches for testing for overall migration and specific chemical migration from microwave susceptors were evaluated. The methods used olive oil as a conventional liquid food simulant, a semisolid simulant of olive oil and water absorbed onto diatomaceous earth, Tenax™ as a dry simulant, and compositional analysis of the susceptor by ASTM methods. The different methods were tested on five susceptor types used for the packaging of pizza, potato chips (French fries), pasty, popcorn, and a curry. For the comparison, the susceptor materials were impregnated with model substances as migration

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Chanda, Arnab, and Rebecca Graeter. "Human Skin-Like Composite Materials for Blast Induced Injury Mitigation." Journal of Composites Science 2, no. 3 (2018): 44. http://dx.doi.org/10.3390/jcs2030044.

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Armors and military grade personal protection equipment (PPE) materials to date are bulky and are not designed to effectively mitigate blast impacts. In the current work, a human skin-like castable simulant material was developed and its blast mitigation characteristics (in terms of induced stress reduction at the bone and muscles) were characterized in the presence of composite reinforcements. The reinforcement employed was Kevlar 129 (commonly used in advanced combat helmets), which was embedded within the novel skin simulant material as the matrix and used to cover a representative extremit

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Garnier, Laurence, Jean-Christophe Gaudin, Paul Bensadoun, Isabelle Rebillat, and Yannick Morel. "Real-Time PCR Assay for Detection of a New Simulant for Poxvirus Biothreat Agents." Applied and Environmental Microbiology 75, no. 6 (2009): 1614–20. http://dx.doi.org/10.1128/aem.02120-08.

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ABSTRACT Research and financial efforts spent on biodefense technologies highlight the current concern for biothreat event preparedness. Nonhazardous but relevant “simulant” microorganisms are typically used to simplify technological developments, testing, and staff training. The bacteriophage MS2, a small RNA virus, is classically used as the reference simulant for biothreat viruses within the biodefense community. However, variola virus, considered a major threat, displays very different features (size, envelope, and double-stranded DNA genome). The size parameter is critical for aerosol sam

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Hvězda, Jiří. "Multi-Zone Models of Combustion and Heat Transfer Processes in SI Engines." Journal of Middle European Construction and Design of Cars 10, no. 2 (2012): 14–22. http://dx.doi.org/10.2478/v10138-012-0008-6.

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Shrnutí Tato práce představuje sadu nově vyvinutých nástrojů implementovatelných do komplexních kódů pro simulaci spalovacích motorů pro zajištění výpočtů týkajících se vysokotlaké části termodynamického cyklu čtyřdobého zážehového motoru. Tento více-zónový simulační nástroj pracuje na základě jednoduché kvazi-dimenzionální metody reflektující reálnou geometrii spalovacího prostoru a používá specifický přístup k popisu chemické transformace složek. V případech abnormálně rychlých chemických reakcí je klasické kinetické schéma adaptivně kombinováno s flexibilní metodou chemické rovnováhy pro zl

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Sadeghi, Meysam, Saeed Farhadi, and Abedin Zabardasti. "A NaX zeolite framework containing magnetic MgFe₂O₄/CdO nanoparticles: synthesis, characterization and catalytic performance in the decontamination of 2-chloroethyl phenyl sulfide (2-CEPS) as a model of sulfur mustard agent." New Journal of Chemistry 45, no. 45 (2021): 21315–26. http://dx.doi.org/10.1039/d1nj04202e.

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Bisták, Andrej, and Zdenka Hulínová. "SIMULAČNÉ MODELOVANIE A JEHO VYUŽITIE PRI PRÍPRAVE STAVEBNÝCH PROCESOV REALIZOVANÝCH VRTUĽNÍKMI." Czech Journal of Civil Engineering 3, no. 2 (2017): 15–21. http://dx.doi.org/10.51704/cjce.2017.vol3.iss2.pp15-21.

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Pri modelovaní stavebných procesov je rozhodujúcou úlohou zvoliť taký druh modelu, ktorý nás čo najefektívnejšie privedie k požadovanému cieľu. Zostavený model má umožniť skúmanie správania sa stavebných procesov v reálnych podmienkach a tiež vyhodnotiť navrhnutú štruktúru procesu na základe požadovaných kritérií. Príprava stavebných procesov realizovaných vrtuľníkmi musí rešpektovať vplyv náhodne sa meniacich podmienok výstavby a súčasne aj špecifické podmienky práce vrtuľníkov. Zložitosť takého systému je možné modelovať pomocou simulačných modelov. Predložený článok obsahuje anal

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Kolla, Eduard, and Veronika Adamová. "3D modelovanie pre potreby simulačnej rekonštrukcie pádu ľudského subjektu z výšky." Krízový manažment 22, no. 2 (2023): 55–63. http://dx.doi.org/10.26552/krm.c.2023.2.55-63.

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The article presents the methodology for 3D modelling for biomechanical evaluation of falls from the height of a human subject. It focuses on 3D modelling as a base for numerical simulation using multibody modules in the PC-Crash simulation software. Basic steps for the creation of a 3D multibody model of the relevant building structure from a 3D point cloud are presented, as well as the procedure for the creation of a biofidelic female human body model. The multibody model of building structure and a multibody model of the human body can be in the following steps used for comprehensive parame

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Ishihara, Shingo, Ko-ichiro Ohno, Hirokazu Konishi, et al. "Prediction of Softening Behavior of Simulant Sinter Ore by ADEM-SPH Model." ISIJ International 60, no. 7 (2020): 1545–50. http://dx.doi.org/10.2355/isijinternational.isijint-2020-078.

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James, Thomas, Samuel Collins, Richard Amlôt, and Tim Marczylo. "Analysis of Chemical Simulants in Urine: A Useful Tool for Assessing Emergency Decontamination Efficacy in Human Volunteer Studies." Prehospital and Disaster Medicine 35, no. 5 (2020): 482–87. http://dx.doi.org/10.1017/s1049023x20000825.

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AbstractIntroduction:To date, all human studies of mass-casualty decontamination for chemical incidents have relied on the collection and analysis of external samples, including skin and hair, to determine decontamination efficacy. The removal of a simulant contaminant from the surface of the body with the assumption that this translates to reduced systemic exposure and reduced risk of secondary contamination has been the main outcome measure of these studies. Some studies have investigated systemic exposure through urinary levels of simulant metabolites. The data obtained in these studies wer

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Li, Peng, Hui Zhang, Shengyuan Jiang, and Weiwei Zhang. "Analysis and Testing of Load Characteristics for Rotary-Percussive Drilling of Lunar Rock Simulant with a Lunar Regolith Coring Bit." Shock and Vibration 2017 (2017): 1–15. http://dx.doi.org/10.1155/2017/3012749.

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Based on an optimized lunar regolith coring bit (LRCB) configuration, the load characteristics of rotary-percussive drilling of lunar rock simulant in a laboratory environment are analyzed to determine the effects of the drilling parameters (the rotational velocity, the penetration rate, and the percussion frequency) on the drilling load. The process of rotary drilling into lunar rock using an LRCB is modeled as an interaction between an elemental blade and the rock. The rock’s fracture mechanism during different stages of the percussive mechanism is analyzed to create a load forecasting model

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Schonberg, W. P. "Energy partitioning in high speed impact of analogue solid rocket motors." Aeronautical Journal 103, no. 1029 (1999): 519–28. http://dx.doi.org/10.1017/s0001924000064277.

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Abstract Modelling the response of solid rocket motors to bullet and fragment impacts is a high priority among the military services from standpoints of both safety and mission effectiveness. Considerable effort is being devoted to characterising the bullet and fragment vulnerability of solid rocket motors, and to developing solid rocket motor case technologies for preventing or lessening the violent responses of rocket motors to these impact loadings. Because full-scale tests are costly, fast-running analytical methods are required to characterise the response of solid rocket motors to ballis

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Vedanayagam, Jeffrey, Ching-Jung Lin, Ranjith Papareddy, et al. "Regulatory logic of endogenous RNAi in silencing de novo genomic conflicts." PLOS Genetics 19, no. 6 (2023): e1010787. http://dx.doi.org/10.1371/journal.pgen.1010787.

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Although the biological utilities of endogenous RNAi (endo-RNAi) have been largely elusive, recent studies reveal its critical role in the non-model fruitfly Drosophila simulans to suppress selfish genes, whose unchecked activities can severely impair spermatogenesis. In particular, hairpin RNA (hpRNA) loci generate endo-siRNAs that suppress evolutionary novel, X-linked, meiotic drive loci. The consequences of deleting even a single hpRNA (Nmy) in males are profound, as such individuals are nearly incapable of siring male progeny. Here, comparative genomic analyses of D. simulans and D. melano

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Huang, Bo, Zhujin Jiang, Peng Lin, and Daosheng Ling. "Research on Impact Process of Lander Footpad against Simulant Lunar Soils." Shock and Vibration 2015 (2015): 1–24. http://dx.doi.org/10.1155/2015/658386.

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The safe landing of a Moon lander and the performance of the precise instruments it carries may be affected by too heavy impact on touchdown. Accordingly, landing characteristics have become an important research focus. Described in this paper are model tests carried out using simulated lunar soils of different relative densities (called “simulant” lunar soils below), with a scale reduction factor of 1/6 to consider the relative gravities of the Earth and Moon. In the model tests, the lander was simplified as an impact column with a saucer-shaped footpad with various impact landing masses and

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Park, Chung Hee, Seh Wan Jeong, Hoon Huh, and Jung Su Park. "Material Behaviors of PBX Simulant with Various Strain Rates." Key Engineering Materials 535-536 (January 2013): 117–20. http://dx.doi.org/10.4028/www.scientific.net/kem.535-536.117.

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This paper is concerned with the material behaviors of PBX(Polymer Bonded eXplosive) simulant at various strain rates ranging from 0.0001/sec to 3150/sec. Material behaviors of PBX at the high strain rates are important in the prediction of deformation modes of PBX in a warhead which undergoes severe impact loading. Inert PBX stimulant which has analogous material behaviors with PBX was utilized for material tests due to safety issues. Uniaxial compressive tests at quasi-static and intermediate strain rates were conducted with cylindrical specimen using a dynamic materials testing machine, INS

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Supak, Kevin, Steve Green, and Amy McCleney. "Using Tapered Channels to Improve LAD Performance for Cryogenic Fluids: Suborbital Testing Results." Gravitational and Space Research 9, no. 1 (2021): 115–20. http://dx.doi.org/10.2478/gsr-2021-0009.

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Abstract Improvement of cryogenic fluid storage and transfer technology for in-space propulsion and storage systems is required for long-term space missions. Screened channel liquid acquisition devices (LADs) have long been used with storable propellants to deliver vapor-free liquid during engine restart and liquid transfer processes. The use of LADs with cryogenic fluids is problematic due to low temperatures associated with cryogenic fluids. External heat leaks will cause vapor bubbles to form within the LADs that are difficult to remove in the existing designs. A tapered LAD channel has bee

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Sawamura, K., M. T. Yamamoto, and T. K. Watanabe. "Hybrid lethal systems in the Drosophila melanogaster species complex. II. The Zygotic hybrid rescue (Zhr) gene of D. melanogaster." Genetics 133, no. 2 (1993): 307–13. http://dx.doi.org/10.1093/genetics/133.2.307.

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Abstract Hybrid females from Drosophila simulans females x Drosophila melanogaster males die as embryos while hybrid males from the reciprocal cross die as larvae. We have recovered a mutation in melanogaster that rescues the former hybrid females. It was located on the X chromosome at a position close to the centromere, and it was a zygotically acting gene, in contrast with mhr (maternal hybrid rescue) in simulans that rescues the same hybrids maternally. We named it Zhr (Zygotic hybrid rescue). The gene also rescues hybrid females from embryonic lethals in crosses of Drosophila mauritiana fe

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Barbash, Daniel A., John Roote, and Michael Ashburner. "The Drosophila melanogaster Hybrid male rescue Gene Causes Inviability in Male and Female Species Hybrids." Genetics 154, no. 4 (2000): 1747–71. http://dx.doi.org/10.1093/genetics/154.4.1747.

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Abstract The Drosophila melanogaster mutation Hmr rescues inviable hybrid sons from the cross of D. melanogaster females to males of its sibling species D. mauritiana, D. simulans, and D. sechellia. We have extended previous observations that hybrid daughters from this cross are poorly viable at high temperatures and have shown that this female lethality is suppressed by Hmr and the rescue mutations In(1)AB and D. simulans Lhr. Deficiencies defined here as Hmr− also suppressed lethality, demonstrating that reducing Hmr+ activity can rescue otherwise inviable hybrids. An Hmr+ duplication had th

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Jiang, Mingjing, Banglu Xi, Fabio V. De Blasio, Huayang Lei, and De’an Sun. "Physical Model Tests of the Bearing Behavior of Tongji-1 Lunar Soil Simulant." Journal of Aerospace Engineering 32, no. 2 (2019): 04018150. http://dx.doi.org/10.1061/(asce)as.1943-5525.0000959.

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Kradtap, Supaporn, C. Ajith Wijayawardhana, Kevin T. Schlueter, H. Brian Halsall, and William R. Heineman. "“Bugbead”: an artificial microorganism model used as a harmless simulant for pathogenic microorganisms." Analytica Chimica Acta 444, no. 1 (2001): 13–26. http://dx.doi.org/10.1016/s0003-2670(01)01152-7.

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Sharvelle, Sybil, Mazdak Arabi, Eric McLamore, and M. Katherine Banks. "Model Development for Biotrickling Filter Treatment of Graywater Simulant and Waste Gas. I." Journal of Environmental Engineering 134, no. 10 (2008): 813–25. http://dx.doi.org/10.1061/(asce)0733-9372(2008)134:10(813).

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Akashi, H. "Inferring weak selection from patterns of polymorphism and divergence at "silent" sites in Drosophila DNA." Genetics 139, no. 2 (1995): 1067–76. http://dx.doi.org/10.1093/genetics/139.2.1067.

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Abstract Patterns of codon usage and "silent" DNA divergence suggest that natural selection discriminates among synonymous codons in Drosophila. "Preferred" codons are consistently found in higher frequencies within their synonymous families in Drosophila melanogaster genes. This suggests a simple model of silent DNA evolution where natural selection favors mutations from unpreferred to preferred codons (preferred changes). Changes in the opposite direction, from preferred to unpreferred synonymous codons (unpreferred changes), are selected against. Here, selection on synonymous DNA mutations

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Harris, Harriet L., and Henk R. Braig. "Sperm chromatin remodelling and Wolbachia-induced cytoplasmic incompatibility in Drosophila." Biochemistry and Cell Biology 81, no. 3 (2003): 229–40. http://dx.doi.org/10.1139/o03-053.

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Wolbachia pipientis is an obligate bacterial endosymbiont, which has successfully invaded approximately 20% of all insect species by manipulating their normal developmental patterns. Wolbachia-induced phenotypes include parthenogenesis, male killing, and, most notably, cytoplasmic incompatibility. In the future these phenotypes might be useful in controlling or modifying insect populations but this will depend on our understanding of the basic molecular processes underlying insect fertilization and development. Wolbachia-infected Drosophila simulans express high levels of cytoplasmic incompati

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